Mottled or colored shingle and method for producing it



A. L. CLAPP June "23, 1931.

MOTTLED OR COLORED SHINGLE AND METHOD FOR PRODUCING IT Filed March 7, 1924 m m n ,0 n I n m I u 2 wag Patented- June 23, 1931 l NrrEo STATES PATENT OFFICE ALBERT L. CLAPP, OF DANVEBS, MASSACHUSETTS, ASSIGNOB- TO THE FLINTKOTE COI- IPANY, O1 BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS MOTTi'LED B COLORED SHINGLE AND METHOD FOR PRODUCING IT Application filed March 7, 1924. Serial No. 697,485.

It is some times desirable for artistic reasons to produce roofing material having mottled or colored efiects and the present invention relates to a method and composition f5 bIy which such effects may be produced on s eet material such as may be produced on a paper machine without the necessity of any su sequent treatment either in the way of saturation or -surface coating to produce as the desired results. :Roofing material having the desirable qualities of being weatherproof and fireproof may be produced directly on a paper machine by incorporating in a suita 1e fibrous {is mixture water and weather roofing mate rials in the manner disclose in my ap lication for patent Serial No. 662,225, ed

September 12, 1923. As therein pointed out asbestos fiber may be employed to advantage at to render the material fireproof and to prevent it from curling, and waterproofing material such as warious gums and asphaltlc or bituminous (Tompounds may be incorporated therein and precipitated on the fibers so as to, permeate the felted (product. Coloring matter may also be adde the pulp before it is run on the, pa or machine.

In' accordance with the present invention, there is delivered to the stock vat in which the cylinder mold rotates, at such point or points therein that it will be the web that has 'ust formed or is forming on the cylinder mold, a daub coat containing the desired surface coloring material. The daub coat, bein thus delivered close the cylinder mol is picked up or de osited upon the exterior of the forming we of fiber, in such manner that it is incorporated in the surface thereof. This may be done by forming the daub coat of a relatively small amount of "fibrous material similar to that Z of'which the sheet or board is to be'madeso art there;

that it will form in the sheet .a's a of, uniting with the main body 0 the ulp, the coloring matter being in relatively ar e apportion and fixed upon or united with t e if desired, may comprise powdered or dissolved igment material and may be fixed m on the t iber of the daub coat, using for that of colorin picked up onber of the daub coat. The coloring matter,

purpose, if necessary, a precipitable size and a recipitating a out. For example, such a aub coat suita le for the asbestos board disclosed in the above mentioned application, may com rise of asbestos, 10% of collulosic fi ers such as rags, beaten together with sufficient water to make a plastic, matter, preferabl igments or water-inso uble substances, such or example, as powdered copper carbonate or red oxide of lron, depending on the color desired. To this mixture may be added aqueous dispersions of water-proofing material such as gilsonite, Montan wax, and/or asphalt, such as that known in the trade as K-B emulsion, and this may be fixed on the fibers, together with the coloring matter, by a suitable precipitate. A size such as rosin size or sodium silicate may be added prior to the addition of the alum, so that when precipitated on .the fiber by the alum, the relatively large proportion of coloring matter and the waterproofing material maybe' fixedto the fibers thereby. This daub coat may be-added to the vat of the paper machine closely adjacent the line of emergence therefrom of the c linder mold and thus immediately beyond t e formation of the web and if distributed in an irre' ular manner causes the daub coat to be ap ied irregularly to the surface of the felte material, thus producing a mottled effect, If ap lied re larly along the length of the cylin er mol an even colored coating is produced, as the daub coat is of uniform 'color. By this method a superficial colorin may be readily produced on the inateria .to eifect such artistic results as may be-deeme'd desirable in any particular case and of,course may be used in the manufacture of paper or board of an description which; is made on a paper mac ine, particularly' a Fourdrinier or cylinder machine. B' introducing the daub coat in this manmix t lies next to the blanket when the web is stripped from the cylinder mold so that if a board is built up therefrom and strip ed from the make-up roll the mottled sur ace iajppegrs on the out or right side of the oar , g If desired, of course, any other suitable material with which it is desired to coat the sur-' face of the sheeted stock may be substituted for the coloring or waterproofing material or both, or used in connection therewith and united with the fibers of the daub coat as by being precipitated thereon and fiberboard or paper for other than roofing or weatherproofing purpose may be colored or otherwise surface treated as hereinbefore described.

On the accompanying drawings,

Figure 1 illustrates diagrammatically an arrangement of apparatus including the wet end of a cylinder machine for carrying out the method of my invention.

Figure 2 represents a section on the line 22 of Figure 1.

Figure 3 illustrates the mottled surface producedv on the sheeted stock or fiberboard.

Referring to the drawings, 1 indicates the vat of a cylinder machine in which rotates a cylinder mold 2. A supply of daub coat is maintained in a receptacle 3 stationed above the vat and from which it gravitates through a pipe 4: to a manifold 5 arranged transversely of the vat l, and thence through a series of spaced vertical pipes 6, each valved as at 7, to the vat 2, closely adjacent to the line of emergence of the cylinder mold therefrom and thus immediately beyond the formation of the web 8. By varying the openings of the several valves 6, gobs of dau coat of various sizes are discharged at different intervals from the several pipes into the vat, as a result of which the daub coat unites irregularly with the web 8 formed on the c linder mold, to produce the mottled. surface effect shown in Figure 3. The daub coat lies next to the blanket '9 which picks u the web from the cylinder mold, so that W en a board is built up from the web on a makeup roll, the mottled surface appears on the outer face of the board.

While I have illustrated the method as being carried out in connection with a cylinder machine, it is evident that it may also be carried out in connection with a Fourdrinier machine, the daub coat being applied immediately beyond the formation of the web on the wire.

Having thus described this invention it should be evident to those skilled in the art that various changes and modifications might be -made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

1. A daub coat for application to fibrous stock as it is being sheeted on a paper machine, which comprises an aqueous pul having a relatively small proportion of brous material capable of being formed with the fibrous stock into a sheet and having a relatively large amount of water-insoluble coloring matter and waterproofing material fixed thereto by a precipitate.

2. A daub coat for application to stock comprising cellulosic and asbestos fiber which comprises a pulp formed of a relatively small proportion of cellulosic and as bestos fiber and a relatively large proportion of the desired coating material fixed to the cellulosic and asbestos fiber of said pulp.

3. A daub coat for application to fibrous stock as it is being sheeted on a paper machine, which comprises an aqueous ulp having a relatively small proportion of fibrous material capable of interfelting with the fibrous stock as it is being sheeted and havinga relatively large amount of a owdered insoluable colorlng compound 'Xed thereto by a precipitate.

4. A daub coat for application to fibrous stock as it is being sheeted on a paper machine, which comprises a pulp having a relatively small proportion of fibrous material capable of interfelting with the fibrous stock as it is being sheeted and having a relatively large amount of powdered copper carbonate fixed thereto by a precipitate.

5. A method of surface-mottling a fibrous web while being formed on a cylinder mold rotating in a stock vat, which comprises delivering at various points into the stock, adjacent to the line of emergence of the cylinder mold from the stock a composition comprising fibers and water-msoluable coloring material fixed to such fibers by a precipitate, said composition becoming irregularl incorporated into the surface of the we being formed.

6. A method of surface-mottling a fibrous web while formed on a cylinder mold rotated in a stock vat which comprises delivering at various points into the stock, adjacent to the line of emergence of the cylinder mold from the stock, a com osition comprisin and waterproo ng material an water-insoluble coloring material fixed to such fibers by a precipitate, said composition becoming irregularly incorporated into the surface of the web bein formed.

In testimony whereo? I have afiixed my signature.

ALBERT L. CLAPP. 

